Simple example

Overview¶

This example demonstrates different ways that the same code can be executed. This is an overview of the four cells shown in the animation below.

1. Define the coroutine function.
   1. Cell 'magic' %callers prints a list of Caller instances and the thread in which it is executing.
   2. Creates an aiologic REvent.
   3. A button is created and and it runs a loop twice:
      1. Prints a statement.
      2. Clears the event.
      3. Waits for the button click to set the event.
2. Execute demo normally.
3. Execute demo concurrently in a task.
4. Execute demo in a thread.

In [1]:

import ipywidgets as ipw
from aiologic import REvent


async def demo():
    %callers

    b = ipw.Button(description="Continue")
    event = REvent()
    b.on_click(lambda _: event.set())
    display(b)
    for i in range(1, 3):
        event.clear()
        b.description = f"Continue {i}"
        print(f"Waiting {i}", end="\r")
        await event
    b.close()
    print("\nDone!")

import ipywidgets as ipw from aiologic import REvent async def demo(): %callers b = ipw.Button(description="Continue") event = REvent() b.on_click(lambda _: event.set()) display(b) for i in range(1, 3): event.clear() b.description = f"Continue {i}" print(f"Waiting {i}", end="\r") await event b.close() print("\nDone!")

In [2]:

suppress-error

await demo()

await demo()

     Name    Running Protected        Thread       

────────────────────────────────────────────────────────

Shell           ✓       🔐    140544958369920 ← current

Control         ✓       🔐    140544817755840

Button(description='Continue', style=ButtonStyle())

Waiting 1

In [3]:

suppress-error

# task
await demo()

# task await demo()

     Name    Running Protected        Thread       

────────────────────────────────────────────────────────

Shell           ✓       🔐    140544958369920 ← current

Control         ✓       🔐    140544817755840

Button(description='Continue', style=ButtonStyle())

Waiting 1

In [4]:

suppress-error

# thread
await demo()

# thread await demo()

           Name          Running Protected        Thread       

────────────────────────────────────────────────────────────────────

Shell                       ✓       🔐    140544958369920

Control                     ✓       🔐    140544817755840

async_kernel_caller         ✓             140544382588608 ← current

Button(description='Continue', style=ButtonStyle())

Waiting 1